Omega PHCN-37 and OPCN-37 Owner's manual

PHCN-37 and OPCN-37

Microprocessor-Based pH Controller with

Automatic Temperature Compensation

TM

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U.S.A. Omega Engineering, Inc.

Headquarters: Toll-Free: 1-800-826-6342 (USA & Canada only)

Customer Service: 1-800-622-2378 (USA & Canada only)

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e-mail: [email protected]

For Other Locations Visit omega.com/worldwide

i

Preface

PREFACE

Manual Objectives

This manual shows you how to set up and use the Programmable Digital Meter.

Standard Procedures:

* Checking voltage jumpers, or changing voltage power

* Mounting the panel

* Configuring Temperature compensation

* Selecting a decimal point position

* Configuring calibration parameters

* Performing two or three-point calibration

* Setting the setpoint’s active band

* Selecting a latched or unlatched operation

* Setting setpoint’s deadbands

* Enabling/disabling analog output

* Selecting analog output as current or voltage

* Scaling analog output

Preface

ii

Table A-1. Sections of the Manual

If you want to read about:

Unpacking; safety considerations

Meter description and features

Main board power jumpers; panel

mounting, sensor input, main power and

analog and relay output

Setpoint value, Temperature

compensation, decimal point position,

calibration, setpoint configuration;

setpoint deadbands, analog output

configuration and scaling

Setpoint values

Display messages

Meter menu/sub-menu messages

Setpoint configuration messages

Specifications

Factory Preset Values

1

2

3

4

5

6

7

8

9

10

Refer to section

Introduction

About the Meter

Getting Started

Configuring the Meter

Selecting Setpoint Values

Display Messages

Menu Configuration

Setpoint Configuration

Displays

Specifications

Factory Default

Setup as Shipped

iii

Preface

Table of Contents

Section Page

SEC 1 INTRODUCTION ............................................1

1.1 Unpacking .................................................1

1.2 Safety Considerations ........................................2

SEC 2 ABOUT THE METER. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

2.1 Description .................................................3

2.2 Features ...................................................3

2.3 Available Accessories ........................................4

2.4 Front of the Meter ...........................................5

2.4.1 Meter Buttons ...............................................6

2.5 Front Panel Button Lockout ....................................8

2.5.1 Jumper Lock Out ............................................8

2.5.2 Push Button Lock Out ........................................8

2.6 Back of Meter ...............................................9

2.7 Disassembly ...............................................11

SEC 3 GETTING STARTED ........................................12

3.1 Rating/Product Label ........................................12

3.2 Main Board Power Jumpers ...................................12

3.3 Main Board Jumpers ........................................13

3.4 Panel Mounting ............................................15

3.5 Connecting Sensor Inputs ....................................16

3.6 Connecting Main Power ......................................17

3.7 Connecting Analog and Relay Outputs ..........................18

SEC 4 CONFIGURING THE METER .................................20

4.0 Specifying Input Type (INPT) pH/ORP Controllers Only .............20

4.1 Selecting the Temperature Compensation Mode (A.T.C.) ...........20

4.2 Selecting a Decimal Point Position (DEC.P) ......................21

4.3 Using Reading Configuration (RD.CF) ...........................22

4.4 Performing Two-Point Calibration (CAL.2) ........................23

4.5 Performing Three-Point Calibration (CAL.3) ......................24

Preface

iv

Table of Contents

Section Page

4.6 Using Setpoint 1 Configurations (S1.CF) .........................25

4.6.1 Setting Setpoint 1’s Active Band ...............................25

4.6.2 Selecting if Setpoint 1 is Latched or Unlatched ....................25

4.6.3 Selecting Setpoint 1 (for pH/ORP Controllers only) .................25

4.7 Using Setpoint 2 Configuration (S2.CF) ..........................26

4.7.1 Setting Setpoint 2’s Active Band ...............................26

4.7.2 Selecting if Setpoint 2 is Latched or Unlatched ....................26

4.7.3 Selecting Setpoint 2 (for pH/ORP Controllers only) .................26

4.8 Setting the Setpoint 1 Deadband (S1.DB) ........................27

4.9 Setting the Setpoint 2 Deadband (S2.DB) ........................27

4.10 Using Output Configuration (OT.CF) ............................29

4.10.1 Enabling or Disabling the Analog Output .........................29

4.10.2 Selecting Analog Output as Current or Voltage ....................29

4.10.3 Selecting Analog Output as pH or ORP (for pH/ORP Controllers only) ..30

4.11 Configuring Temperature (C or F-TEMP) ........................31

4.12 Using Output Scale and Offset (OT.S.O) .........................32

4.12.1 Example for Output Scale and Offset ...........................34

SEC 5 SELECTING SETPOINT VALUES .............................35

SEC 6 DISPLAY MESSAGES ......................................36

SEC 7 MENU CONFIGURATION DISPLAYS ..........................37

SEC 8 SETPOINT CONFIGURATION DISPLAYS .......................40

SEC 9 SPECIFICATIONS ..........................................41

SEC 10 FACTORY PRESET VALUES ................................45

CE APPROVAL SECTION .............................................46

v

Preface

List of Figures

Figure Page

2-1a Front of Meter - pH Controller ..................................5

2-1b Front of Meter - pH/ORP Controller ..............................5

2-2 ac Power Connector Label (with dc-Power Detail) ..................9

3-1 Main Board Power Jumpers (W1, W2, W3) ......................12

3-2 Main Board Jumper Positions .................................13

3-3 Upper Isolated Analog Output Option Board Installation .............13

3-4 Meter - Exploded View .......................................15

3-5 Panel Cut-Out .............................................15

3-6 pH and RTD Connections ....................................16

3-7 Main Power Connections - ac .................................17

3-8 Main Power Connections -dc ..................................18

3-9 Relay Output Connections ....................................18

3-10 Analog Output Connections ...................................19

3-11 Isolated Analog Output Connections ............................19

4-1 Relay Output Triggering Example ..............................28

9-1 Dimensions/Panel Cutout ....................................44

List of Tables

Table Page

A-1 Sections of the Manuals .......................................ii

2-1 Accessories and Add-Ons .....................................4

2-2 Connector Description .......................................10

3-1 Jumper Functions ..........................................14

3-2 ac-Power Connections .......................................17

6-1 Display Messages ..........................................36

7-1 Configuration Menu .........................................37

7-2 Run Mode Displays .........................................39

8-1 Setpoint Configuration Displays ................................40

10-1 Factory Preset Values .......................................45

NOTES, WARNINGS and CAUTIONS

Information that is especially important to note is identified by three labels:

• NOTE

• WARNING

• CAUTION

• IMPORTANT

NOTE: provides you with information that is important to successfully setup and

use the Programmable Digital Meter.

CAUTION or WARNING: tells you about the risk of electric shock.

CAUTION, WARNING or IMPORTANT: tells you of circumstances or practices

that can effect the meter’s functionality and must refer to accompanying

documents.

TIP: Provides you helpful hints.

Preface

vi

1

Introduction

1

SECTION 1. INTRODUCTION

1.1 UNPACKING

Remove the Packing List and verify that all equipment has been received. If there are

any questions about the shipment, use the phone number for the Customer Service

Department nearest you.

Upon receipt of shipment, inspect the container and equipment for any signs of damage.

Take particular note of any evidence of rough handling in transit. Immediately report any

damage to the shipping agent.

The carrier will not honor any claims unless all shipping material is saved

for their examination. After examining and removing contents, save packing

material and carton in the event reshipment is necessary.

Verify that you receive the following items in the shipping box:

QTY DESCRIPTION

1 Programmable Digital Meter indicator/controller with all applicable

connectors attached.

1 Owner’s Manual

1 Set Mounting brackets

If you ordered any of the available options (except the “BL” blank Lens

option), they will be shipped in a separate container to avoid any damage to

your indicator/controller.

For first-time users: Refer to the QuickStart Manual for basic operation and

set-up instructions.

1

Introduction

2

1.2 SAFETY CONSIDERATIONS

This device is marked with the international caution symbol. It is important to

read this manual before installing or commissioning this device as it contains

important information relating to Safety and EMC (Electromagnetic Compatibility).

This instrument is a panel mount device protected in accordance with 2014/35/EU,

electrical safety requirements for electrical equipment for measurement, control and

laboratory. Installation of this instrument should be done by qualified personnel. In

order to ensure safe operation, the following instructions should be followed.

This instrument has no power-on switch. An external switch or circuit-breaker shall be

included in the building installation as a disconnecting device. It shall be marked to

indicate this function, and it shall be in close proximity to the equipment within easy

reach of the operator. The switch or circuit-breaker shall not interrupt the Protective

Conductor (Earth wire), and it shall meet the relevant requirements of IEC 947–1

and IEC 947-3 (International Electrotechnical Commission). The switch shall not be

incorporated in the main supply cord.

Furthermore, to provide protection against excessive energy being drawn from the main

supply in case of a fault in the equipment, an overcurrent protection device shall be

installed.

• Do not exceed voltage rating on the label located on the top of the instrument

housing.

• Always disconnect power before changing signal and power connections.

• Do not use this instrument on a work bench without its case for safety reasons.

• Do not operate this instrument in flammable or explosive atmospheres.

• Do not expose this instrument to rain or moisture.

• Unit mounting should allow for adequate ventilation to ensure instrument does not

exceed operating temperature rating.

• Use electrical wires with adequate size to handle mechanical strain and power

requirements. Install without exposing bare wire outside the connector to minimize

electrical shock hazards.

EMC Considerations

• Whenever EMC is an issue, always use shielded cables.

• Never run signal and power wires in the same conduit.

• Use signal wire connections with twisted-pair cables.

• Install Ferrite Bead(s) on signal wires close to the instrument if EMC problems

persist.

Failure to follow all instructions and warnings may result in injury!

Note

☞

3

About The Meter

2

SECTION 2. ABOUT THE METER

2.1 DESCRIPTION

This Digital Programmable meter is a value packed microprocessor-based pH controller

or pH/ORP controller. This pH controller includes automatic or manual temperature

compensation, quick calibration to 4, 7 and 10 pH; accepts most BNC combination

pH electrodes with or without 100 or 1000 ohm RTD. Standard features include analog

output and dual relay output. Isolated analog output must be ordered at time of

purchase. Retransmission analog output is fully scalable. Dual 5 amp, form C relays

control critical processes. A mechanical lockout has been included to guard against

unauthorized changes.

2.2 FEATURES

The following is a list of standard features:

* 4-digit 14-segment LED display - red or green display

* NEMA 4 / Type 4 Front Bezel

* ±0.01 pH accuracy

* 0.5ºC Temperature accuracy

* 100 or 1000 ohm RTD input

* Nonvolatile memory-no battery backup

* Dual 5 amp, form C relay outputs

* Scalable non-isolated analog outputs

* 115 or 230 Vac 50/60 Hz power supply

or 10-32 Vdc or 26-56 Vdc

The following is a list of optional features:

* Scalable isolated analog output

2

About The Meter

4

2.3 AVAILABLE ACCESSORIES

Table 2-1. Accessories and Add-Ons

Add-On Options

FS Special Calibration/Configuration

SPC4 NEMA-4 Splash Proof Cover

SPC18 NEMA-4 Splash Proof Cover, NEW

Accessories

TP1A Trimplate panel adaptor.

Adapts DIN1A/DIN2A cases to larger panel cutouts

RP18 19-In. Rack Panel for one (1) 1/8 DIN instrument

RP28 19-In. Rack Panel for two (2) 1/8 DIN instrument

RP38 19-In. Rack Panel for three (3) 1/8 DIN instrument

5

About The Meter

2

2.4 FRONT OF THE METER

SETPTS T/mV MENU RESET/pH

Figure 2-1a. Front of meter - pH Controller

SETPTS T/mV MENU RESET/pH/ORP

Figure 2-1b. Front of meter - pH/ORP Controller

METER DISPLAY:

Digital LED display -1.9.9.9. or 9.9.9.9. 4-digit 14 segment, 0.54” high

LED display with programmable decimal point.

These meter display windows light when appropriate:

1 Setpoint 1 status

2 Setpoint 2 status

pH pH displays

mV mV displays

ºC Celsius

ºF Fahrenheit

2

About The Meter

6

2.4.1 METER BUTTONS

SETPTS Button

In the run mode, this button will sequentially recall the previous setpoint settings. As

necessary, use the



/pH and



/mV buttons to alter these settings, then press the

SETPTS button to store new values.

Unless you press the SETPTS,



/pH, or



/mV button within 20 seconds, the meter will

scroll to setpoint 2 and then to the run mode.



/pH Button (for pH Controller)

In the run mode, this button will view pH value.

In the configuration mode, press this button to change the value of the flashing digit

shown on the display and/or toggle between menu choices, such as “R.2=F” or “R.2=C”

on RD.CF menu. When configuring your setpoint values, press the /pH button to

advance the flashing digit’s value from 0 to 9 by 1.



/pH/ORP Button (for pH/ORP Controller)

In the run mode, this button will view pH value.

If you have a pH/ORP Controller: throughout this manual’s text, the



/pH/ORP

button is referenced as the



/pH button.

To toggle between the pH and ORP values while in the “Run Mode” (Normal Operation).

Use this button also to change the value of the digits while in the “Setpoint” and “Menu”

(Configuration) Modes.



T/mV Button (for pH Controller)

In the run mode press the T/mV button to recall the mV value of your input signal.

Press the T/mV button a second time to recall the temperature value of your input.

In the configuration mode, press this button to scroll to the next digit.



T/mV Button (for pH/ORP Controller)

To view temperature while in the “Run Mode” (Normal Operation). Use this button also

to select the digit’s position while in the “Setpoint” and “Menu” (Configuration) Modes.

7

About The Meter

2

2.4.1 METER BUTTONS (Continued)

MENU Button

In the run mode, press the MENU button to terminate the current measuring process and

enter you into the configuration mode.

In the configuration mode, press the MENU button to store changes in the nonvolatile

memory and then advance you to the next menu item.

RESET Button

If you hard reset (press the MENU button followed by the RESET button) or power off/on the

meter, it shows “RST”, followed by “pH”.

In the run mode, press the RESET button to reset the latched setpoints. The meter shows

“SP.RS” and returns to the run mode.

In the configuration mode, press the RESET button once to review the previous menu.

Press the RESET button twice to perform a hard reset and return to the run mode.

In the setpoint mode, press the RESET button to enter the run mode. The meter shows

“RUN” and enters the run mode.

When in setpoint or configuration mode, if the meter shows 9999 or

-1999 with all flashing digits, the value has overflowed. Press the



/MAX

button to start a new value.

2

About The Meter

8

2.5 FRONT-PANEL BUTTON LOCK OUT (For Security Purposes)

2.5.1 Jumper Lock Out

To lock all front-panel buttons, remove the S3-A jumper (refer to Figure 3-2).

To lock the MENU button only, verify that the S3-B jumper is removed, then install the

S3-A and S3-E jumpers (refer to Table 3-1). If you press the MENU button, the meter

shows “LOCK” and returns to the run mode.

2.5.2 Push Button Lock Out

To lock the RESET, MENU and SETPTS buttons only, verify that the S3-A jumper is installed

and the S3-E jumper is not installed, then follow these steps:

In the run mode -

1. Press and hold down the RESET button. The meter shows “SP.RS” or

“RUN”. Do not release the RESET button.

2. Press the MENU button and hold the RESET button down (3-5 seconds) until

the meter shows “LOCK”.

3. Release both buttons.

To unlock the RESET, MENU and SETPTS buttons, follow these steps:

1. Press and hold down the RESET button. The meter shows “LOCK”.

Do not release the RESET button.

2. Press the MENU button and hold the RESET button down (3-5 seconds)

until the meter shows “UN.LK”.

3. Release both buttons.

9

About The Meter

2

2.6 BACK OF THE METER

Figure 2-2 shows the label describing the connectors on the back of the meter. Table

2-1 on the following page gives a brief description of each connector at the back of the

meter.

+R

RTD INPUT*ANALOG OUT*

TB1

RELAY 1

RELAY 2

ISOLATED*

*

= CONNECT TO LOW VOLTAGE LIMITED ENERGY CIRCUITRY ONLY.

ANALOG OUT

A

EXT RETURN: REMOVE S4-A & CONNECT EXT RTN TO "-R"

NO EXTERNAL RETURN: INSTALL S4-A

TB2

 INPUT*

RTNVOLT CURR

TB

POWER & INPUT CONNECTIONS 

S

DC

TB1

AC



NC

+

N.C.2N.C.1N.O.1COM1 COM2N.O.2

VOLT RTNCURR

NCR

LN

 

 

21 



12*11*1* *2*1*

*2*1*

Figure 2-2. ac Power Connector Label (with dc Power detail)

2

About The Meter

10

2.6 BACK OF THE METER (Continued)

Table 2-2. Connector Description

Connection Description

TB1-1 Setpoint 1: Normally Open (N.O.1) connection

TB1-2 Setpoint 1: Normally Closed (N.C.1) connection

TB1-3 Setpoint 1: Common (COM1) connection

TB1-4 Setpoint 2: Normally Open (N.O.2) connection

TB1-5 Setpoint 2: Normally Closed (N.C.2) connection

TB1-6 Setpoint 2: Common (COM2) connection

TB1-7 ac Line connection (no connections on dc-powered units)

TB1-8 ac Neutral connection (+ Input on dc-powered units)

TB1-9 ac Earth ground (dc-power Return on dc-powered units)

TB1-10 Analog Voltage Output connection

TB1-11 Analog Current Output connection

TB1-12 Analog Return connection

TB2-1 +R: RTD connection Pin 1 connection

TB2-2 -R: RTD connection Pin 2 connection

TB5-1 Isolated Analog Voltage Output connection

TB5-2 Isolated Analog Current Output connection

TB5-3 Isolated Analog Output Return connection

J3 Main pH or pH/ORP input BNC connector

11

About The Meter

2

2.7 DISASSEMBLY

You may need to open up the meter for one of the following reasons:

• To check or change the 115 or 230 Vac power jumpers.

• To install or remove jumpers on the main board.

Disconnect the power supply before proceeding.

To remove and access the main board, follow these steps:

• Disconnect the main power from the meter.

• Remove the back case cover.

• Lift the back of the main board upwards and let it slide out of the case.

3

Getting Started

12

SECTION 3. GETTING STARTED

Caution: The meter has no power-on switch, so it will be in operation as

soon you apply power.

If you power off/on the meter, or perform a hard reset (press the RESET button twice),

the meter shows “RST”, followed by “PH”.

3.1 RATING/PRODUCT LABEL

This label is located on top of the meter housing (refer to Figure 3-4).

3.2 MAIN BOARD POWER JUMPERS (refer to Figure 3-1)

Important: If you want to change the Factory preset jumpers, do the

following steps; otherwise go to section 3.3.

Disconnect the power from the unit before proceeding.

1. Remove the main board from the case. Refer to Section 2.7.

2. Locate the solder jumpers W1, W2, and W3 (located near the edge of the main

board alongside the transformer).

3. If your power requirement is 115 V ac, solder jumpers W1 and W3 should

be wired, but jumper W2 should not. If your power requirement is 230 V ac,

solder jumper W2 should be wired, but jumpers W1 and W3 should not.

Figure 3-1 shows the location of solder jumpers W1 through W3.

DISPLAY BOARD

TRANSFORMER

W3 W1

W2

115V ac

230V ac

W3 W2 W1

Figure 3.1 Main Board Power Jumpers

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Omega PHCN-37 and OPCN-37 Owner's manual

Omega PHCN-37 and OPCN-37 Owner's manual

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